A cannabis high from smoking or vaping typically lasts 1 to 3 hours, while edibles can keep you high for 6 to 8 hours or longer. The exact duration depends on how you consumed it, how much THC was involved, and how often you use cannabis. Here’s what to expect from each method and what factors shift your timeline.
Smoking and Vaping: 1 to 3 Hours
When you inhale cannabis, whether from a joint, pipe, bong, or vape, THC passes through your lung membranes and enters your bloodstream within minutes. You’ll feel the effects almost immediately, with the high peaking around 15 to 60 minutes after your first hit. From there, the intensity tapers off, and most people feel back to baseline within 2 to 3 hours.
If you’re a first-time or infrequent user, expect the high to feel stronger and last longer than it would for someone who uses cannabis regularly. Frequent use builds tolerance, which shortens how long the effects feel noticeable.
Dabs and Concentrates
Concentrates like wax, shatter, and dabs deliver far more THC per hit than regular flower, but the high doesn’t necessarily last much longer. Dabs take effect within seconds, peak at 15 to 30 minutes, and last roughly 1 to 3 hours, similar to flower. The main difference is intensity: the peak hits harder and faster because you’re absorbing more THC at once. That said, frequent high-potency sessions push tolerance up quickly, which can actually shorten how long the high feels significant over time.
Edibles: 6 to 8 Hours (Sometimes Longer)
Edibles are a different experience entirely. They take 30 to 60 minutes to kick in, sometimes up to 90 minutes depending on your metabolism and whether you’ve eaten recently. Peak blood levels of THC hit around 3 hours after you eat the edible, meaning you’re still climbing toward the strongest effects long after smoking would have already worn off. The total high generally lasts 6 to 8 hours, though some people report effects lingering up to 12 hours with higher doses.
The reason edibles last so much longer comes down to how your liver processes THC. When you eat cannabis, your liver converts THC into a different compound that crosses into the brain more efficiently and is estimated to be 2 to 3 times more potent than the THC you inhale. This metabolite also sticks around in your system longer, which is why edible highs feel both more intense and more drawn out. More of the active substance gets absorbed by your body through this route, so a 10 mg edible can feel far stronger than inhaling what seems like the same amount of THC.
Tinctures and Sublingual Oils
THC oil held under the tongue falls somewhere between smoking and edibles. The onset is fast, around 5 to 10 minutes, because the THC absorbs through the thin tissue under your tongue and enters the bloodstream directly. It peaks at about 30 to 45 minutes. The trade-off is that the effects are shorter, typically wearing off within 1 to 2 hours. If you swallow the oil instead of holding it under your tongue, it behaves more like an edible, with a slower onset and longer duration.
What Makes Your High Last Longer or Shorter
Several factors push the timeline in either direction:
- Tolerance. Regular users metabolize THC more efficiently and experience shorter, less intense highs compared to occasional users.
- Dose and potency. Higher THC content means a stronger and often longer-lasting high. A single hit of low-potency flower fades faster than multiple hits of a high-THC strain.
- Body composition. THC is fat-soluble, so individual differences in metabolism and body fat can influence how quickly your body processes it.
- CBD content. Products that contain both THC and CBD may actually produce a longer, stronger high. Research from the National Center for Complementary and Integrative Health found that when CBD and THC are consumed together orally, CBD slows down the body’s ability to clear THC, prolonging exposure. Participants who ate brownies containing both compounds experienced stronger sedation, more anxiety, and greater memory difficulty than those who consumed the same dose of THC alone.
How Long You’re Actually Impaired
Feeling “not high anymore” and being fully unimpaired are two different things. Your subjective high may fade after a couple of hours from smoking, but reaction time, attention, and motor coordination can remain affected well beyond that window. Research on cannabis and driving suggests that most cognitive effects from inhalation recover between 5 and 7 hours, though some impairment begins declining around 4.5 hours.
Current guidelines recommend waiting at least 6 to 8 hours after smoking or vaping before driving, and 8 to 12 hours after eating an edible. These windows account for the fact that impairment lingers after the noticeable high fades, especially with higher doses or less frequent use.
The Next Day: Weed Hangovers
Some people feel off the morning after using cannabis, particularly after high doses or edibles. Commonly reported symptoms include fatigue, brain fog, dry mouth, dry eyes, headaches, and mild nausea. Research has confirmed that cannabis use can lead to daytime fatigue the following day, and some studies have noted irritability and low mood as lingering effects.
There’s no set duration for a weed hangover. Some people don’t experience one at all. The strength of the dose, the method of consumption, and individual tolerance all play a role. With edibles especially, if THC blood levels remain elevated overnight, you may still feel mildly high when you wake up. Staying hydrated and getting adequate sleep can help, but the only reliable way to avoid a weed hangover is using a lower dose.